Multiple Accessing for the Collision Channel Without Feedback
J. Hui · IEEE Journal on Selected Areas in Communications · 1984
We consider asynchronous multiple accessing without feedback over the collision channel. Redundant coding is used to overcome user interference which causes erasures for collided packets. The channel has a sum capacity of e-1and a sum cutoff rate of 0.295. The best codes are long constraint length rate 1/3 convolutional encoders which achieve a sum throughput up to the sum cutoff rate using an easy-to-implement forward search decoding algorithm. In the presence of additive Gaussian noise, the same redundant coding can save, at hardly any extra cost, about 6 dB of signal-to-noise ratio.